I have browsed several answers... but none seems to address my question.

As reported in bug #1067876 the options to "safely remove" an external drive is gone.

No problem! Umount is sufficient for me. However, I cannot recognize WHEN it is safe to pull the USB plug out since the icon for the storage device does not disappear, and no notification is displayed. How can I know if it is safe to unplug the device? How can I explain to my mother when it is safe to do so? So I am looking for an easy solution (as it is present in 12.04).

I know that I can take a look with Gnome Disks, or check in a terminal with 'mount'. Ubuntu is supposed to be user-friendly. Ejecting external drives is daily business. It cannot be possible that users have to use special software or terminal commands to check if they can safely unplug a device.
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AndreDec 31 '12 at 1:16